We put a set of headers on a grill for a bar. They were off a derby car. they went up like pulling tractors. We were going to just bolt them on but we actually holesawed the grill so smoke would come out the headers.
There is a vendor that comes to Gateway that has an actual front engine dragster converted in to a bbq grill / smoker. I'm trying to find info and pics of it for you. I think it's called "Nitro Hog"